Machine for internally threading sleeves



Feb. 23, 1932. A. l... WALLACE 1,845,925

l MACHINE FOR INTERNALLY THREADING SLEEVES Filed Jan. 25, 1929 S'Sheets-Sheet .l

Feb. 2 3, 1932. A, WALLACE 1,846,925

MACHINE FOR INTERNALLYTHREADING sLEEvEs AT TQRNEY Feb. 23, 1932. A. LA.. WALLACE 1,846,925

MACHINE FOR IN-'ERNALLY THREADING SLEEVES Nm w 1* lf O Q5 b. w ff s p/C A gg QE-- 'D ws \\fv .w ln ig E A E Rf@ A lNvENT R MJL/WML Patented Feb. 23, 1932 UNITED stares Leraars;

ARCHIBALDk L. WALLACE.or1 BitooizLYN', New Yon-Ki,`

MACHINE Fon IivfrnrtivriLLY4 yfrHnEAnINGr 'sLnEvEs i Application filed January 25, 1929. Serial No. 334,883.

This invention relates to a machine for internally threading sleeves Vor like Atubular members. l f* An object of the invention is toprovide a machine for this purpose wlierewith sleeves may be quickly threaded one after the other in rapid succession. j Y

A further and more detailed object is .to provide a machine having one part into which wunthreaded sleeves may be placed, and hav ing another part for feeding the sleeves in rapid succession to a threading device also comprised in the machine. Y

A further detailed object is to provide etli- Hcient means to care for the delivery of threaded sleeves from the machine.

A further detailed vobject is to provide means to prevent overheating of therthreading device.

; A further object is to'provid'e improved means by which to remove shavings and chips produced by the cutter. Y V

A further detailed obj ect is to provide simple vand efficient means whereby the machine is rendered capable of operating upon sleeves of different sizes. y

A further detail object is to provide animproved delivery and washing device for the completed sleeves. 1 f Other objects and aims of the invention, more or less specificthan those referred to above, will bein` part obvious and in part pointed out in the course of the following description of the elements, combinations, arsagrangements of parts and applications of principles constituting the invention; and the scope of protection contemplated will be in-A ,Y dicated in the appended claims. j y

In the accompanying drawings-which are 4a to be taken as a part of this specification, and in which l have shownl merely a preferred form of embodiment of the invention lis a side elevational view, partly in section. of a machine constructed in accordance with this invention. j

2 is an enlarged vertical sectional vievsT liirough a portionof the machine as seen in 5% is a vertical sectional view taken 5G; upon the plane of line H11-III of Fig. 2."

Y carrying shell employed.

v Fig. eis asimilar sectional view taken upon` the planeof line IV-IV of Eig. 2. 'i ,j Fig.; 5 is a detail sectional vi wof a part Y. of the delivery Ydevice embodied in the machine, andM f i v' 'c i Fig. 6 is a horizontal sectionalvviewA taken upon the planeof line VI-VI of Fig. 5, and lig.Y 7 is a ,fragmentary4 detail view'illus-f trating structuralv features. of the "sleeve"KA -Y f Referring now to the exemplary structure illustrated in the drawings for. describing said. structure in detail, the reference character indicates aj main platform' or bed. This is shown as consisting 'of a pair of channel irons as 1 and 2 spaced .apartzand con- Y nected together by a suitable cover plate 3., Legs as 117-4 are shown .for supporting this, bed elevated above the floor 5, and in the space beneath the bed, resting preferably upon the floor 5 is conveniently placed a I no' tor G, a tank H anda wash tank A; v l

Upon lthe upper Vsurface of the bed L is carried a pair olf-standards as'G and 7 fo11741A rotatably supporting between them a tubular, shell 8 extending longitudinally substantially parallel with the upper surface of thebed but]` spaced above said surface. Y. vThe standard 6 has an opening 9 through which the shell extends, said -openingfbeingV provided with a ball-race 10 withinv which Vengage balls 11 which also. engage a oo -operative ball-race 12 carried by theshell 8. The standard 7 is cylindrical at its upper end in continuation of the shell 8 and provides a bearing as 13 within which the adfV jacent endrof the shell is rotatable. A gland member as 14 is arranged as a part of this.

bearing adjustable to compress a gasket as 15 against the outer surface of the shell to provide an oil tight bearing for a reason which will presently be referred to. V,This standard has an openingaslat itsupper` r side through which 1unthreaded sleeves as 17-17 may move downwardly from a maga- 95 zine 18 which is conveniently attached at this point. At the lower. end of the opening 16, and mounted to reciprocate in the cylindrical portion 19 of -theistandard` aligned,

'with the shellS is a plunger 20operable to;V 10G move the sleeves successively along the length of the shell one with each forward movement of the plunger. This plunger is likewise provided with a gland as 2l operable upon a packing 22 to provide an oil tight joint -between itself andthe wall of the cylinder'19.

At asuitable point between the lstandards 6 and 7 the shell 8 carries a sprocket wheel 23. This is engaged by a chain 24 extending from the motor G, the shell being thusV v connected to be rotated by the motor.

` The mechanism for operating the plunger Y 2O consists of a shaft 25 extending trans- 25r ed upon the bed L and engage the sleeve for .gitudinally kof* the shaft.

versely beneath the shell, seel Fig. 3, at a location preferably between the standards 6 and 7. A sleeve 26 is mounted Vto rotate freely upon this shaft and said sleeve and shaft are'free to move longitudinally withl lrespect to each other. A worm gear 28 is fixed to the sleeve, as by key 27, and has constant v.engagement with a wormv pinion 29 fixed tothe shell 8 so that rotation of said shell willserve to drive the sleeve 26.

Suitable bearings as 30 and 3l are mountrotatably supporting said sleeve, and beyond said bearings the sleeve is enlarged to provide a pair of oppositely facing friction sur- -faces as V32 and 33.`

vby their lower ends upon the members l and 2 of the bed L as by means of pivot pins 43 and 44, and to their upper ends are pivotally attached a pair of connector `rodsv and 46, said rods in turn having their free 'ends pivotally connected as 'Aat 47 withthe outer end of the plunger 20. l

A headas 48 is provided at one end of the shaft l25 engaging the outer surface of the eccentric 39, and an adjustable clamp member is provided at the opposite end engagingthe eccentric 40. these parts being'intended to force the surfaces 36-37 toward the sur'- faces 32`33 as will be readily understood. Simple clamp nuts as 49-50 may be connected 'with a threaded extension as 51 of the shaft 25.as indicated to constitute the required adjustablevmeans for this purpose, and suitable friction members as 52 and 53 may be arranged 'between the surfaces 32 36 'and 33-37 sothat a desirable smooth clutclito move freely 1oning effect is provided by the frictional grip of the mentioned surfaces against the members 52-53.

Adjacent the end of the shell 8 opposite the plunger 20 -is arranged a stationary threading device or cutter as 54 and the purpose of the plunger is to force the sleeves one against the other along the interior of the shell from the magazine 18 and against and onto the cutter. Y

` Since itis desirable that the-plunger pressure shall continueafter the threading operation has begun and until the cutter has taken a goed Vhold upon the sleeve, and since the speed of travel of the sleeve when it has once been lgripped by the cutter is positively determined by the pitch of the cuttery threads, itis desirable that the plunger shall not be positively driven but shall be capable'of stopping or of slowing up whenev abnormal opposition. f

The clutch mechanism above described'for controlling the plunger is designed for ac-V complishing this result. The ratio of the worm gear and pinion 28 and 29 vis `such that the normal speed of movement imparted to er it encounters Y the plunger is relatively greater than the speed of movement of a sleeve over the cutter 54. The gripping power ofthe clutch is sufficient to force a sleeve onto the cutter but is vet suflicientlv vweak to provide for slippage between thev clutch faces as may bev required thereafter until the ecentric cams 39 and40 f in the opposite direction.

The thread cutter 54 projects axially `into the adjacent end of the shell 8, and it will be understoodthat the sleeves are rotated over said cutter. .Rotary movement may be im-'f parted to the sleeves in anyappropriate manner but is preferably imparted directly from the shell 8 by interengaging formations propass centre and begin to move the plunger vided upon the sleeves and said shell,` 4 A` simple expedient to this end consists in forming Vthe sleeves with a plurality of longitudinal ribs as 55 and of forming that portion of the shell 8 which 'surrounds the vcutter with co-operative ribs as 56, said ribs interengaging together-sothatthe sleeves are thereby forced to rotate with the shell while passing the cutter but being of course free to move longitudinally along the shell.

1 A plurality of spring fingers as 57-57 are carried by the shell at a point ahead of the cutter 54 for yieldingly engaging the ribs of the sleeves to serve as guiding means for guidingthe sleeves toward the cutter with the ribs 55 thereof in register with the ribs 56 of the shell.

An expanding clutch vdevice as 58 is arranged'in a stationary position forwardly ofv theV cutter adapted to engage the interior ofLA thesleeves they come into co-operative relation with the spring fingers 57. Prior to reaching this clutch device the sleeves are rotating freely withthe shell-8 but whenv their interior surfaces engage the clutch device said device imparts a restraining effect tending to stop this rotation and thereby cause the spring fingers to engage'in a predetermined relation against the ribs 55 of each sleeve as the sleeves move successively past them and into engagement with the ribs 56 ,which of course have a definitepositionwith of said shell; 15'V There may be any desired number of the spring fingers 57, but as seen inV Fig, 4, three thereof is sufficient. These are arranged to project radially of the shell at spaced vcircumferential points. Each is slidable' within a bearing 59,2; spring as 60 being arranged to press it inwardly.

The shell 8 may i butl is preferably sufiiciently long so as to accommodate half'adozen oi more of un threaded sleeves therein between the plunger and vthe cutter at all times, the length of course being gaged vwith respect to the length of the respective sleeves so that the combined llength ofthe rsleeves abuttingtogether will be appropriate forcorrectniovement of the last sleeve onto the cutter by operation of the plunger.

Gneiniportant purpose of confining a plu- `.rality of sleeves within the shell is toV pro- 'vide for cooling said sleeves, it being. intended that the space Within the shell between the plunger and the cuttershall be at all times filled, or nearly so, with a suitable liquid Acooling' medium. For this purpose the plunger 20 is made hollow.

A flexible hose as 6l is attached to the outer end of the` plunger in communication with the bore 62 thereof. This hose extends into connection with one side of a pump 63. "The pump may be of any desired type but is illustrated as being of the Vordinary gear type, driven by a sprocket chain as 64 extending to a sprocket 65 carried by the shell 8, and from its opposite sidea Npipe 66 communicates with the tank H so that the oil or other cooling niediumV centained in said tank is continually fed upwardly by means of the pump into the interior of the shell 8 whenever the machineis operating'.

The cooling medium flows through the shell being of course in intimate contact with all of the sleeves therein due to the rotary movement of the shell and sleeves, and flows outwardly from the opposite end ofthe shell and row of sleeves as at 67, falling from said end into the open tankl-l. Y

The purpose of the packingsaboutthe shell 8 and about the plunger Vwill now be aparent naniel to revent loss of the cooling 7 Y. C i

liquid. Y

It is intended that the tank H shall be be ofV any desired length A suiiiciently large soy that the cooling medium will stand therein amply long to become cold before again being drawn upwardly through the pipe 66. Any means may be employed to' assist the cooling of the liquid while within the tank, an instance of such means being suggested by the fan 68 mounted upon the shaft of the motor G.

In its travel through the shell 8 the cooling medium of course passes intimately notonly j about the shells for cooling them preparatory to being operated upon by the cutter 54: but

also about theV cutter itself and its supporting 1 element 69. By thus insuring a cool condition of the sleeves preparatory tobeing operated upon, as well as a'cool condition of the operating deviceor cutter itzbeconies .possible for the cutting operation to proceed almost,` vcontinuously i through successive sleeves for indefinite periods. rThe cutter may be somewhat heated by the vtime `it has completed the threading of each sleeve but when the next sleeve, being cool, engages it the heat will be i 54, as illustrated, consists of a stiff' steelr bar, which may be conveniently referred to herein as the delivery bar. rlhis bar has one end projecting into the adjacentend of the shell.

8, and has'the cutter mounted directly there on in axial alignment therewith. The connec` tion is preferably made by means of a threaded extension as 270 of the cutter engaging within a threaded socket 7l of the bar. The portion of the bar adjacent the cutter extends straight outwardly of the shell 8 and through a cylinder 7,2 which is spaced Vfrom the end of the shell and is formed within a standard 7 3 which is supported upon the bed L.

Beyond the cylinder 72 the bar 69 curves downwardly between the bed members land 2 and into a. second cylinder as 74 supported between said bed members, the cylinder 7ll being disposed axially at right yangles -to the cylinder 72.

llhe bar 69 is of suitable size so thatthe sleeves after having passedrovei' land been threaded by the cutter 54 may slide freely through said cylinders, it being here noted however that the presence of one or more' sleevesjsurrounding the bar andwithin each of the cylinders will serve to approximately centre the bar within the'cylinders, the sleeves at this' time constituting simple tr'avelling fillers between theout-er' surface of the bar and the inner surface of the cylinders, `and it being further noted that the'iL disposition of the two cylinders with respect to each other, togetlierwith thecorrespondy ingangular disposition ofthe parts of the bar therein respectively will serve as means ica 'Y los Lit angular bar may be produced by the forced movement,

bar, through thecylinders, and thencedownn wardly into the tank A where the oil and grit will be washed from the sleeves preparatory to use ot the sleeves for their intended purposes. l l

AMovement of the sleeves along the delivery of the successive sleeves passing over the cutter, but it is desirable in some cases, particularly where sleeves of the larger sizes are being threaded, to provide an auxiliary pro-V pelling mechanism so as thus to relieve the Y sleeve which is heine threaded from all unnecessary strains. in example of auxiliary mechanism for thisr purpose is` indicated in F ig. vl of the drawings wherein it is shown to consist of a slide rod mounted in a bea-ring 76 to slidey back and forth along said bearing in a path parallel with the length of the delivery bar 69. Liglatch as 7 7 is carried at one' end of this rod positioned to engage Vthe sleeves for moving them away from the cutter whenever the rod moves that direction, but said latch being tree to move in the opposite direction without corresponding movement of the sleeves. The latch is shown to be gravity controlled for this purpose and to have a stop as T8 associated rtherewith tor permitting it to swing only in asingle direction as will be readily understood.

Connected with tne'slide rod 75 is a plunger 7 9 movable within a cylinder 80. A compression spring 8l is provided for urging this plunger, and with itthe rod 75 in a direction toward the-cutter 5st,` and air pressure is admissible into the cylinder through a pipe 82 for moving the plunger and rod in the op-` posite direction.

Adjustable stops, such as those indicated at 83 and 84;, may be provided for adjustably Idet-ermining the` limits of movement of the.' rod.

The control of air pressure through the p pe 82 may he ei'ected by any appropriate means but in the instance illustrated is ef- .fected bv the use of a pair of valvesV as S5 and 86, the former being an inlet valve and the latter an exhaust valve.A A source et air pressure is lead to the valve 85 by means of a pipe 87, the opposite side ot the valve 85 'Ibeing connected with the pipe 82 .so that whenever the valve 86 is openthe air pressure from pipe S7 will move through pipe 82 and into the cylinder 80. Theivalve 86 communicates with the pipe/82 by means ofa pipe 88 so that t e `pressure-within the pipe voperating the plunger 20, above referred to,

and this shaft carries `a `pair of camsas 89 and 90 fixed thereto operable upon the valves respectively so that as said shaft rotates the valves will be opened andclosed in appropriately tim-edrelation to the rdelivery periods ot successivesleeves from the cutter 54 so that said sleeves will be promptly picked up by the latch 77 and moved along the delivery bara suitable distancek to provideclearance for the unhindered delivery of the neXtsucceeding sleeve from the cutter. Y i Y After the completed sleeves haveV moved through the cylinderlYl at the end of the delivery bar 69 they may -fall permiscuously if,-

desired into the wash tank A, but itis preferable however that theybe vsystematically controlled during their passage through this tank, and for this purpose the drawing herewith suggests the use of an auxiliary delivery rod as 91 which is of general U-shape and which is arranged to dip downwardly into the tank, the opposite legs as 92 and 93 round- .ing upwardly andthe whole serving as a track, in the saine manner as mentioned with respect to the delivery bar 69, along which the sleeves may travel. One end of this auxiliaiy delivei'ylrod, `as the upper end ot the leg 93 thereof. may` extend into the lower end.`

ofthe cylinder 74, said end being tapered to" easily receive the sleeves from the lower end of the' delivery'bar 69, as seen in Fig. 5. The opposite end or leg as 92 may be shaped and disposed to extend to any desired locationtor garrycing the washed sleeves as may be preerre The cylinder 74 is rpreferably made up of two longitudinal halves as 94 and 95, see Fig'.

6, said halves being separable to facilitate detachment vof the adjacent end ot the ,delivery bar 69 from said cylinder whenever'for any reason it is desired to remove the delivery bar from its operative position within the cylis necessary to repair or replace'the cutter 54, or the clutch member '58 carried thereby.

vinder 7 2 and shell V8, as for instance when it ln the instanceillustrated the halves 94CV and 95 are separably connected together by meansot a dove-tailed slide joint betweenthem as i at 96. rllhe' half 95, which is disposed at that side of the delivery. bar nearest to the standard 73, is rigidly mounted upon a cross plate 97 fastened in place between the members l and 2 of the bed L,`and the half 94 is connected thereto, by means of the joint 96 so that it may be removed by simply lifting it upwardly away from the half 95; It is apparent from the drawings that when the4 half 94 is Aremoved the delivery bar can beslid directly rearwardly out of tlie shell 8 and cylinder 72, but that while said half 944 is in position the delivery bar is held in its proper operative relation thereby. s

Suitable means may be employed for enabling the device described to operateupon;

sleeves of different sizes. An example ot such The shell 8is made up of two tubular mem-V bers as 98 and`99 telescoped snugly but'removably one within the other, it being intend-` ed that the bore of the inner member 99 shall be of a size calculated to properly receive sleeves` to be operated upon while the outer diameter is of asize to properly fit within the bore of the outer member 98. Different inner members may be provided, all having the same outside diameter, but being of varying inside diameters so that'one inner member may be Isubstituted 'for the other as may be required to providethe proper interior size for the workin hand. Y l A To retain the tubular members98`- and 99 assembled during operation of the machine the drawings, see Fig. 7, shows the outer member as having a bayonet slot as 100 therein adapted to receive a lateral projection as 101 of the inner member. ,A l

rlhe spring fingers 57 are carried by the inner member 99 so that the'inner ends of said spring lingers will at all 'times bear agiven relation with the bore of said'inner member,

the ribs 56 being of course also carried by the 'inner member for Ithe same purpose.

The lateral projection 101 for engaging within the bayonet slot may be conveniently included as a portion of the extension 102 which projects laterally from the member 99 to provide the bearing 59 for the adjacent- Drin@r fino-er 57.'

The cutter 54, and the` clutch device are detachablefrom the delivery lbar through the medium of the threadedstud 70, so that these elements may be readily replaced'by cutters and clutch devicesof proper sizesto operate upon sleeves of different sizes.`

rlhe delivery b'ar itself is of course removable and may be replaced by a'bar ofl any appropriate diameter.

The cylinder 72 hasaremovable lining'lOB which may be readily replaced by a'lining Y having an interior bore of the proper size to handle n the work in hand at any given time.

The cylinder' 74 may be' readily detached,

as by. removal of the holding bolts 104, and repllaced by a cylinder of appropriate Size, anc I Of course' the delivery bar 91 may be resV placeable by bars or tracks of any size'or con- `struction desired. 2 i

The magazine 18, and the parts associatedtherewith, may be of s uch size as to accom` inodate the` largest sleeves upon Qwhich the machine is adapted to operate, and obviously sleeves ofsmaller sizes can be readilyaccommodated therein. .Preferablyhowever a separate lining member as 105 is employed having a transverse opening as 106 through its lower end to accommodatethe plunger.

The plunger mayhave'aremovable head kas 107 so that heads of appropriatesizes may be attached, the size` of this head, and of the opening`1OG, and of the interior of the member 99 being always made to correspond.,

'In making use of this machine it is 'simply necessary for the operator to Vkeep asupply of unthreaded sleevesv within the magazine 18.' The plunger 20 will move these one at ja time into the interior of the shell 8 which constitutes a cooling chamber as 108. The sleeves will cumulate and be cooled within 'this chamber until the chamber is lled and the first sleeve has reached thercutter 54C.'y

vr)The movements of the plunger are timed Vso ythat'pressure is at this moment being exerted icient to cause the irst sleeve to bite onto the cutter, whereupon slippage will beginlto ocl -curbetweenv the' Aclutch faces 32-36 'and 33% 37 with the required friction to hold the sleeve j from losing its grip upon the cutter. Y Assoo'n'as'thesleeve has taken a full grip upon plunger will return to allow another sleeve to fall infront of it from the magazine, the operation then being repeated.V When the fully threaded sleeve has moved'beyond the cutter it will be engaged bythe latch 77 of,

the propelling mechanism and forced along the delivery bar to make room for thenext succeeding' sleeve as above fully explained. The cooling liquid in moving through'the shell 8 and through the row of sleeves therein willto a certain extent of course continue to flow through the sleeves while the sleeves are passing over the cutter, dueto thepresence ofthe longitudinal grooves as 109 in the cutgter,` and will continue through the threaded sleeve or through any number of the threaded sleeves which happen to Abe in close row formation on the carrier 69 immediately behind thecutter. This flow of the cooling liquid through the 'sleeves while the sleeves areV be.- ing threaded andv thereafter 4will carry with it the shavings or chipsfform'ed by the cutter andthese will fallwith thev cooling-liquid from' the end of the threaded'sleeve or sleeves, asat 110', into the tankH. The rotary move ment of the threaded sleeves, andthe conseeov quent swirling'action of the liquid Vflowing therethrough will greatly assist in the removal of shavings and chips from within the sleeves "so that the sliding movement of the sleeves along the delivery bar will not'be like#r ly to be interferred with by thev objectionable presence of chipsfbetween the sleeves andthe delivery bar at any time during movement f of the sleeves along the 4entire length of the delivery bar. Y It is noteworthy here that the` auxiliary propellinginechanism above described opv1w Y ,ist Y against the row of sleeves inthe chamber sufso erates toalways provide the open s'paceas 111 between adjacent threaded sleeves on the delivery bar lat a point close to the cutter so as thus to facilitate the easy delivery of the cooling lliquid and chips out of the end of the sleeve as indicated.`

'"In order to further guard against fric- "tional interference `between the sleeves and kthe delivery bar dueto thepossible presence of a chip which might have eluded the cleansing action of the flowing liquid as just referred to, it is proposed that the entire length the delivery bar is also reduced by this means.

In order that the flow of liquid through thecooling chamber 108 may be maintained at a substantially uniform maximum rate it is' proposed that the pump 68 shall if desired kbe of sufcient capacity so' that the cooling liquid will' be pumped through the plunger 2O at a greater rate than its rate of delivery out of the opposite end of the cooling chamber. The level of liquid within thechambei will thus be made to rise into and overflow Vthe magazine 18. On this account the magaQ Zine 18 is shown' to be'provided with an overflowopening as 114 communicating with la pan`115 exteriorally of the vmagazine and thence with a return pipe fas 116 b ywhich the overflowing liquid is returned into the tank H. By this means alsothe sleeves contained within the magazine' aresubjected to the cooling action of the liquid.

i The entire mechanism is simply, sturdy and practical. The substantially continuous cut,- ting action of the cutter is made possible by the means provided for the cooling of the sleeves before 'they are operated upon and for cooling the cutter and sleeve during the cutting operation, and by the means provided for delivering the threaded sleeves away from the 'cutter `r any number of sleeves' maybe threaded in rapidv succession. A

AsV many'changes could be made in this construction `without departing from the scope vof thel invention asldefined in the Vvfollowing claims, itis intended that all mattei' contained in the above description, or shown in the'accompanying drawings, shall be inter-V preted as illustrative only and not in a limiting sense.

Having thus described my invention, what I'claim as new and desire to secure by Lch ters Patent is :Vd v

1. lA thread cutting machine comprising a thread cutter, means providing aV cooling chamber for containing a plurality V.of articles to be threaded, Vsaid cooling chamber ly* tially thereon, thus providing in eEect a series -frontof saidfthread cutter adapted hold a supply of the articles preparatory to lengagementof the articles with the thread cutter, and means operable to feed saidY ar- 70 Ytic-les through said chamber to the thread cutter, said chamber having an overiiow opening above the level of the articles contained in said chamber, together with means to cause a flow of cooling liquid through the cooling 7 chamber to submerge the articles therein and 'overflow from said chamber through said overflow opening. f e v 2. A machine for internallyv threading sleeves, comprising a stationarythread cutf ter adapted to receive a. sleeve thereover to be threaded, and means providing a cooling chamber for said thread cutter and sleeve operable to rotate the sleeve aboutthe thread cutter to thereby thread the sleeve, together with means to cause a iiow of cooling liquid through said chamber and through the sleeve during and after the threading operation, a bar upon which the cutter is mounted serving asa track along which the sleeves move after which said thread cutteris positionedfthe` remainder offtlielength of the shell extending beyond the front end of the thread cutter and being of a length to receive a row of sleeves therein, means to feed a row of sleeves along the interior of said shell to the thread cutter, Y

means to rotateksaid shell, means adapted'to provide interengagement between the shell and the end sleeve which is in engagement with the thread cutter whereby to rotate said end Vsleeve with the shell for effecting the threading operation, and means to provide a continuousliow ofcooling liquid through the shell and the sleeves and about the thread cutter.

4;. A machine'lforA internallythreading sleeves,kcomprising a tubular shell for containing a row of sleeves to be threaded, a thread cutter withinone end of said shell, the remainder ofthe length of the shell eX- tending beyond the front end of the thread cutter, means at the opposite end of the shell tov move the row alongfthe shellso that the sleeves will pass successvelyov'er the thread cutter, Va' coolant withinthe shell yin contact with all of the sleeves therein, means to rotate the shell to thereby agitate the rownofl sleeves within the coolant, and'means adapt-'- ed tojprovidev interengagement between theI shell and the sleeve which is in engagement with the thread cutter to ythereby rotate the threading tool tobe threaded, and means j whereby the interior of the shell Will be maintained full of cooling liquid to submerge the articles in said shell. r

13.` A threadcutting machine comprising a horizontally disposed tubular. shell closed at one end, a threading tool partially closing the opposite end f of the shell, a relatively vertically disposed chute opening into the shell adjacent the first end adapted to feed into the interior of the vshell articles to be threaded, a

plunger constituting the closure at the closed end operable to move the articles from said end along the shell to the threadingitool, plunger Voperating' means, means to rotate the shell, means whereby rotation of the shell Will cause an article in engagement with the threading tool to be threaded, and means whereby the interior of the shelland a portion of the chute will be maintained full of cooling liquid to submerge the articles in the shell and in the mentioned portion of the chute. o

14. A machine for internally threading sleeves, comprising a thread cutter, a rotatably mounted tubular shell through Which sleeves may be moved to the thread cutter, means to rotate said shell, means to move the sleeves along the shell, means carried by the shell adapted to engage cop-operative portionsof the sleeves to thereby Cause rotation of the sleeves with the shell for eecting the threading operation, and means including a spring dog carried by the shell operable to engage the mentioned co-'operative portions of the sleeves for insuring co-operative en'- gagement of the sleeves With said last-mentioned means.

ln testimony whereof I amr; my signature.

ARCHIBALD L. VALLACE. 

